Jacoby Ellsbury scratched

NEW YORK -- Red Sox outfielder Jacoby Ellsbury, who looked fine after his club record-setting five-steal night Thursday in Philadelphia, was a late scratch from Friday's lineup because of tightness in his left groin.

Ellsbury's place in center field against the Yankees was taken by Jackie Bradley Jr., who made his first big league start in center. Daniel Nava batted leadoff.

Ellsbury was wearing an ice pack in the affected area after Thursday night's game, but was so upbeat that no one thought to ask him if it was an issue.

Manager John Farrell obviously did not anticipate a carryover; he had Ellsbury in his original lineup.

Ellsbury had treatment at the ballpark early Friday afternoon and is listed as day to day.

"We'll get a better sense and gauge of what his capacity will be, but that's about the extent of what we can say right now," Farrell said.

The Red Sox have a day off Monday, which means if they have any concerns that Ellsbury could aggravate the condition by playing, he would get five days off in a row if he doesn't play here. With Shane Victorino not eligible to come off the DL until Wednesday, Bradley will be the center fielder as long as Ellsbury is out, Farrell said.

The Red Sox are losing Ellsbury at his most productive. In his last 10 games, Ellsbury has posted a slash line of .400/.489/.550/1.039, scoring six runs, walking six times, collecting five extra-base hits and stealing eight bases. He has raised his batting average from .241 on May 20 to its current .268, while his on-base average has risen from .303 to .337.

Ellsbury will not face Yankees left-hander CC Sabathia on Friday night. He was batting .226 (7 for 31) against Sabathia, who had struck out Ellsbury nine times while walking him once. Among Ellsbury's hits off Sabathia are a double and home run.